Re: Fwd: Sony a7R1 and a7R3 introduce a pixel shift in each consecutive image capture

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Hi.
Does the mirror vibration move the camera?
Petro.

On Fri, 31 Mar 2023 at 11:25, Rafal Mantiuk <[email protected]> wrote:

> Hi,
>
> When capturing a sequence of images using
> --capture-image-and-download, each image approx 12 seconds apart from
> the previous one, the pixels in the consecutive images are shifted, as
> can be seen in this GIF:
>
> https://www.dropbox.com/s/91llepa8hwpm81u/sony_a7r3_2.8-90_v2.gif?dl=0
>
> The GIF shows 10 frames. The shift is the most obvious when
> transitioning from the last to the first frame.
>
> Another example, 30 frames for a different lens:
>
> https://www.dropbox.com/s/9pa0aoxy3rs5dwc/sony_a7r1_1.8-50_jpeg_v3.gif?dl=0
>
> This is a big bummer when trying to use the camera for computer
> vision, calibration or photogrammetry.
>
> I cannot observe such a problem with Canon (Rebel T1).
>
> Image stabilization is switched off - both optical and in-camera. a7R1
> should not have in-camera stabilization or a movable sensor. I tried
> also the lens without optical image stabilization. The same happens
> for RAW and JPEG capture.
>
> Interestingly, the shift is quite predictable - the image always goes
> up and right. This looks more like a "feature" rather than a bug.
>
> Does anyone have any idea what could be causing this pixel shift?
>
> Thanks,
>
> Rafal
>
>
> _______________________________________________
> Gphoto-user mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/gphoto-user
>

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<div dir=3D"ltr">Hi.<div>Does the mirror vibration move the camera?</div><d=
iv>Petro.</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=
=3D"gmail_attr">On Fri, 31 Mar 2023 at 11:25, Rafal Mantiuk &lt;<a href=3D"=
mailto:[email protected]">[email protected]</a>&gt; wrote:<br></div><blockq=
uote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1p=
x solid rgb(204,204,204);padding-left:1ex">Hi,<br>
<br>
When capturing a sequence of images using<br>
--capture-image-and-download, each image approx 12 seconds apart from<br>
the previous one, the pixels in the consecutive images are shifted, as<br>
can be seen in this GIF:<br>
<br>
<a href=3D"https://www.dropbox.com/s/91llepa8hwpm81u/sony_a7r3_2.8-90_v2.gi=
f?dl=3D0" rel=3D"noreferrer" target=3D"_blank">https://www.dropbox.com/s/91=
llepa8hwpm81u/sony_a7r3_2.8-90_v2.gif?dl=3D0</a><br>
<br>
The GIF shows 10 frames. The shift is the most obvious when<br>
transitioning from the last to the first frame.<br>
<br>
Another example, 30 frames for a different lens:<br>
<br>
<a href=3D"https://www.dropbox.com/s/9pa0aoxy3rs5dwc/sony_a7r1_1.8-50_jpeg_=
v3.gif?dl=3D0" rel=3D"noreferrer" target=3D"_blank">https://www.dropbox.com=
/s/9pa0aoxy3rs5dwc/sony_a7r1_1.8-50_jpeg_v3.gif?dl=3D0</a><br>
<br>
This is a big bummer when trying to use the camera for computer<br>
vision, calibration or photogrammetry.<br>
<br>
I cannot observe such a problem with Canon (Rebel T1).<br>
<br>
Image stabilization is switched off - both optical and in-camera. a7R1<br>
should not have in-camera stabilization or a movable sensor. I tried<br>
also the lens without optical image stabilization. The same happens<br>
for RAW and JPEG capture.<br>
<br>
Interestingly, the shift is quite predictable - the image always goes<br>
up and right. This looks more like a &quot;feature&quot; rather than a bug.=
<br>
<br>
Does anyone have any idea what could be causing this pixel shift?<br>
<br>
Thanks,<br>
<br>
Rafal<br>
<br>
<br>
_______________________________________________<br>
Gphoto-user mailing list<br>
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[email protected]</a><br>
<a href=3D"https://lists.sourceforge.net/lists/listinfo/gphoto-user" rel=3D=
"noreferrer" target=3D"_blank">https://lists.sourceforge.net/lists/listinfo=
/gphoto-user</a><br>
</blockquote></div>

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